1971 年 21 巻 5-6 号 p. 214-221
HAYASHI, Ichiroku (Sugadaira Biol. Lab. of Tokyo Kyoiku Univ.) Phenology of grassland species at Sugadaira, Central Japan. Jap. J. Ecol. 21,214-221 (1971) The flowering times of 100 grassland species were observed at Sugadaira in 1968. At the same time, the growth forms of these species were examined and the relationship between the growth form and the flowering time was discussed. Most species flowering in spring belong to b, t and r types of Numata's system of classification. On the other hand e type is abundant in species whose flower initiation occur in August and September. According to the data, there is close relationship between the flowering time and the growth form. This fact suggests that the seeds ripend in spring and early summer, and in late summer and autumn may be made of the matter assimilated last, and in the current growing season, respectively. The characteristics of the life cycle of grassland species, including the flowering time, are under discussion in term of the growth form or distribution of the matter assimilated to the organ of the plant.